Maesn Reviews & Product Details

Maesn is the Unified API for ERP and Accounting integrations, built to help software teams connect with complex enterprise systems - fast, reliably, and at scale. Software increasingly relies on deep integrations with ERP and accounting systems to drive adoption, retention, and growth. However, building and maintaining these integrations in-house is slow, costly, and operationally complex. Maesn removes this burden by providing a single, standardized API that connects software products to dozens of ERP and accounting systems across Europe. With Maesn, product and engineering teams build one integration instead of many. Our Unified API abstracts system-specific complexity through a common data model, unified authentication. This allows teams to ship integrations in days instead of months - without worrying about system- or country-specific requirements, legacy ERP architectures or ongoing maintenance. Maesn is designed for enterprise-grade use cases, including invoicing, accounts payable and receivable automation, expense synchronization, financial analysis, and bidirectional ERP workflows. Data can be read from and written back to connected systems while maintaining financial accuracy, consistency, and compliance. Real-time synchronization replaces manual CSV imports and exports, improving data quality and end-user experience. Security and compliance are at the core of Maesn. We are ISO 27001 certified, GDPR compliant, made in Europe and hosted in Germany. Maesn follows a security-by-design approach and does not store any data, ensuring customers remain fully in control of their information. For go-to-market teams, integrations powered by Maesn become a growth lever. Software vendors increase ACV, shorten sales cycles, improve win rates, and unlock new customer segments by offering native ERP and accounting integrations without engineering bottlenecks. Customer Success teams benefit from faster onboarding, higher adoption, and reduced support overhead thanks to reliable, production-ready integrations. Maesn is trusted by leading software companies building for the complex European software landscape. Whether you’re launching your first integration or scaling to dozens of systems, Maesn provides the infrastructure to make enterprise software truly interoperable - without the complexity.

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Melanie Eckl

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Maesn Integrations

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Integration information sourced from real user reviews.

Maesn Media

Maesn Demo - Quick Start: Start Building Integrations Now!

With Maesn’s Quick Start guide, developers can connect their first ERP or accounting integration the same day and start building scalable integrations immediately.

Maesn Demo - Developer-Centric API Documentation

Maesn provides clear, structured, and developer-first documentation that covers authentication, data models, and workflows - so teams can understand and implement integrations faster.

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Felix P.

CEO

Small-Business (50 or fewer emp.)

2/13/2026

"Best-in-Class Documentation, Responsive Support, and a Great Unified Data Model"

5/5

What do you like best about Maesn?

What stands out most about Maesn is their best-in-class documentation and customer service. The documentation is well structured, and developer-focused. It makes complex integrations easy to understand, with well-explained authentication flows, data models, and workflows.

Their customer service is equally impressive. The team is highly responsive, technically strong, and genuinely engaged. You get direct access to people who understand the product in depth, which makes problem-solving fast and efficient.

I’m also a big fan of their underlying data model. Maesn has managed to design a unified model that supports a wide range of target systems without feeling overly abstract or limiting. It strikes a strong balance between standardization and flexibility, which is difficult to achieve in integration platforms. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

Nothing really, or as someone else mentioned: one can never have enough integrations! Review collected by and hosted on G2.com.

What problems is Maesn solving and how is that benefiting you?

The idea of integrating once with Maesn and then gaining access to multiple target systems through a unified model has significantly reduced both the engineering and administrative effort on our side. Some of the supported systems have fairly complex onboarding flows that typically require substantial time and coordination, and Maesn has effectively eliminated that burden.

By standardizing integrations around a strong, well-designed data model, Maesn reduces maintenance overhead, accelerates implementation, and lets us stay focused on our core product instead of spending time on integration management. Review collected by and hosted on G2.com.

Ricardas K.

Full Stack Engineer

Mid-Market (51-1000 emp.)

12/10/2025

"Exceptional Support and Seamless Integration Experience"

5/5

What do you like best about Maesn?

The support provided is truly first class, with impressively quick response times. The documentation is thorough and easy to follow, which made integration a smooth process for me. I also appreciate the wide range of accounting integrations and endpoints available. It's clear that the endpoints are continuously being developed and expanded, which adds even more value to the platform. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

At the moment, I have no complaints about Maesn. Review collected by and hosted on G2.com.

What problems is Maesn solving and how is that benefiting you?

It simplifies the complexity of dealing with multiple accounting APIs, enabling us to concentrate on adding as many integrations as possible quickly. At the same time, it ensures our data format remains consistent, so we don't have to worry about the differences or specific details of various integrations and API providers. Review collected by and hosted on G2.com.

Tom C.

2/11/2026

"First-class API integration with fantastic support"

5/5

What do you like best about Maesn?

I am very satisfied with the good customer service from Maesn. We can reach them quickly via Slack or phone. I also appreciate the very young, modern team that is constantly working on further developments. Additionally, the API documentation is very easy to understand. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

So far, everything is working very well. In the end, a platform like Maesn depends on the number of integration partners it offers. Therefore, we look forward to Maesn gradually adding more and more to its portfolio. Review collected by and hosted on G2.com.

Daniel S.

CPO

Small-Business (50 or fewer emp.)

12/23/2025

"Effortlessly Integrates Diverse Solutions, Saves Time"

5/5

What do you like best about Maesn?

I like Maesn because it makes connecting different integrations with our solution as easy as possible due to their unified API capabilities. Maesn helps us save costs and time on our packed roadmap to deliver value faster to our customers. I appreciate that we can facilitate integrations just by connecting with Maesn once, which would otherwise cost too much time. I like that Maesn is very hands-on, and the communication and experience of getting started were guided, helpful, and easy to do. The initial setup of Maesn was quite easy for our team. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

You can never have enough integrations. But they keep on building, from which we also benefit. Review collected by and hosted on G2.com.

Per Q.

Chief Product & Technology Officer

Mid-Market (51-1000 emp.)

2/16/2026

Business partner of the seller or seller's competitor, not included in G2 scores.

"Powerful Integrations with Exceptional Support"

5/5

What do you like best about Maesn?

Maesn has helped us build integrations with accounting systems, allowing us to focus on other priorities in our roadmap. We are especially pleased with the support we have received whenever we needed extended functionality in an integration that Maesn has arranged for us. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

So far, Maesn has delivered everything as expected or better. Review collected by and hosted on G2.com.

Timo M.

2/13/2026

"Excellent integration with outstanding support"

5/5

What do you like best about Maesn?

I find the strong simplification of the technical integration of various platforms by Maesn really great. The excellent customer service and the quick response are also great advantages. Additionally, the initial setup was very easy, as we were very well supported by the team from Maesn. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

Everything is fine. Review collected by and hosted on G2.com.

What problems is Maesn solving and how is that benefiting you?

Maesn enables me to have easier access to the DATEV interface and helps us, in combination with the Salesforce extension integraid.app, to completely automate the integration with Salesforce. It simplifies the technical integration of various platforms and offers excellent customer service with quick response. Review collected by and hosted on G2.com.

Nick T.

Founder & CEO

2/13/2026

"Great Founders, Fast Integration, Smooth Onboarding"

5/5

What do you like best about Maesn?

I appreciate Maesn for its fast way to integrate with a wide coverage of systems. They are one of the few that support DATEV so well. Founders are great and responsive. Our team really likes the product and the initial integration was smooth. They are consistently growing and expanding their API coverage rapidly. Overall a very pleasant experience. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

- Review collected by and hosted on G2.com.

Moritz J.

CEO

Small-Business (50 or fewer emp.)

2/13/2026

"Easy, Straightforward Integrations That Cut Our Implementation Time"

5/5

What do you like best about Maesn?

The integration of many services is easy and straightforward, and it has drastically reduced our implementation time. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

So far, we haven’t found anything to dislike about Maesn. Review collected by and hosted on G2.com.

Philipp L.

Small-Business (50 or fewer emp.)

2/16/2026

"Accelerates our effort to be more connected with stellar support"

4.5/5

What do you like best about Maesn?

I like that the support is super quick and professional. They also work together with us to formulate their road map, which is really cooperative. The initial setup was super easy, and they provided human support along the way. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

Some integrations are not covering complex use cases, but they're working really hard to fix this. Review collected by and hosted on G2.com.

Verified User in Veterinary

Mid-Market (51-1000 emp.)

2/16/2026

"Friendly, Supportive Developers with Fast Responses"

4.5/5

What do you like best about Maesn?

It significantly reduces the effort required to integrate the tax advisor of my choice. The developer contacts are also very friendly, supportive, and helpful, and they respond quickly whenever I reach out. Review collected by and hosted on G2.com.

What do you dislike about Maesn?

The API documentation can feel a bit clunky to navigate, and it can be confusing to tell which parts are actually relevant to my use case. Review collected by and hosted on G2.com.